Empire. Sicily was the first part of Italy to be taken under general Belisarius who was commissioned by Eastern Emperor Justinian I. Sicily was used as a base for the Byzantines to conquer the rest of Italy, with Naples, Rome, Milan and the Ostrogoth capital Ravenna falling within five years. However, a new Ostrogoth king, Totila, drove down the Italian peninsula, plundering and conquering Sicily in 550. Totila, in turn, was defeated and killed in the Battle of Taginae by the Byzantine general Narses in 552. When Ravenna fell to the Lombards in the middle of the 6th century, Syracuse became Byzantium's main western outpost. Latin was gradually supplanted by Greek as the national language and the Greek rites of the Eastern Church were adopted. The Byzantine Emperor Constans II decided to move from the capital Constantinople to Syracuse in Sicily in 663, the following year he launched an assault from Sicily against the Lombard Duchy of Benevento, which then occupied most of Southern Italy. The rumours that the capital of the empire was to be moved to Syracuse, along with small raids probably cost Constans his life as he was assassinated in 668. His son Constantine IV succeeded him, a brief usurpation in Sicily by Mizizios being quickly suppressed by the new emperor. From the late 7th century, Sicily joined with Calabria to form the Byzantine Theme of Sicily. Muslim period In 826, Euphemius, the commander of the Byzantine fleet of Sicily, forced a nun to marry him. Emperor Michael II caught wind of the matter and ordered that general Constantine end the marriage and cut off Euphemius' nose. Euphemius rose up, killed Constantine and then occupied Syracuse; he in turn was defeated and driven out to North Africa. There, Euphemius requested the help of Ziyadat Allah, the Aghlabid Emir of Tunisia, in regaining the island; an Islamic army of Arabs, Berbers, Cretan Saracens and Persians was sent. The conquest was a see-saw affair; the local population resisted fiercely and the Arabs suffered considerable dissension and infighting among themselves. It took over a century to complete the conquest (although practically complete by 902, the last Byzantine strongholds held out until 965). Throughout this reign, continued revolts by Byzantine Sicilians happened, especially in the east, and part of the lands were even re-occupied before being quashed. Agricultural items, such as oranges, lemons, pistachio and sugar cane, were brought to Sicily,